Electric fence charger



Feb. 23, 1943. G. E., BoRToN ELECTRIC FENCE CHARGER 2; Sheets-Sheet 1vFiled Oct. 19, 1938 Inventor mwN Sw u WW MQW MM. mh

Feb. 23, 1943. G. E. BoRToN 2,311,634

ELECTRIC FENCE CHARGER Filed Oct. 19, 1938 2 Sheets-Sheet 2 Inventor Q E@Offb/7 Attorneys Patented Foti. 23, 1943 einen UNITED STATES `PATENTOFFICE ELECTRIC FENCE CHARGER Glen Everettorton, Munson, Mich.

Application October 19, 1938, Serial No. 235,919

2 Claims.

My invention relates generally to means for charging a one-wire electricfence, and particularly to automatic electric fence controlling meanswhich maintains the fence in an energized condition, and an importantobject of my invention is to provide an arrangement o! this characterwhich aiords no injury to animal or human life, and whose currentconsumption is practically negligible despite the fact that the fence iskept in constantly effective shocking condition. y

Other important objects and advantages of my invention will be apparentfrom a reading of the following description taken in connection with thedrawings, wherein for purposes of illustration I have shown a preferredembodiment of my invention.

In the drawings:

Figure i is a general schematic wiring diagram showing the electricalcomponents and the connections therebetween.

Figure 2 is an enlarged longitudinal vertical sectional View takenthrough the rotary Contact drum.

Figure 3 is a transverse vertical sectional view taken through Figure 2.t

Figure 4 is an end elevational view of the selistarting low watt A. C.motor and showing the reducing gears which drive the rotary contactdrum.

Referring in detail to the drawings, and partion of the segment I'Iwhich lies to the left of the fingers 2| and 22, so that the brush 23 isin uninterrupted electrical engagement with the segment I'l. A secondbrush 24 is positioned to engage the segment |'I and the fingers 2| and22, the insulation in the slots I8 and 20 causing a disconnectionelectrically of the brush 24 with the segment i1 twice each fullrevolution. of the drum. A third brush 25 engages that portion of thesegment i8 which lies to the right of the :fingers 2| and 22, and is inuninterrupted electrical engagement with the segment I8. A wire 28 leadsfrom the third brush 25 to the single wire fence 21.

The first brush 23 is connected to one side of the secondary 28 of theradio transformer 29, and a branch 30 is grounded as indicated by thenumeral 3| and located between the brush 23 and the said side of thesecondary 28. The remaining side of the secondary 28 is connected by awire 32 to the second brush 24.

The primary 83 of the transformer 29 has n one side connected to thealternating current ticularly to Figure 1 thereof, the numerals 5 and 8refer respectively to the sides of a pret erably 110 volts A. C. currentinput. The wire 5 is connected'by a branch `I with one side of the smallself-starting low watt rating motor 8 on whose shaft is a small pinion 8which is in mesh with an idler pinion I8 which is in turn in mesh with agear II which is fastened to the shaft i2 which turns in the respectivesupports i3 and I4 and has fixed thereon the contact drum I5.

The contact drum I5 comprises a dielectric cylinder I6 on which arecircumposed the 1onuitudinally spaced cylindrical segments I1 and I8which are separated by a slot i8 which at diametrically opposite pointsof the drum has longitudinally extending U-shaped portions, said clotand its said portions being iilled with insulation as indicated by therespective numerals i8' and 20', whereby the segments I1 and I8 areinsulated from each other. Two contact lingers 2| and 22, respectively,defined on the segment I8 by the U-shaped portions extend into thesegment I1 as clearly shown in Figure l.. A first brush 23 constantlyengages that porinput wire 5, while the remaining side of the primary 38is connected to one end of the winding 34 of a relay coil 35, theremaining end of this winding 34 being connected by a wire 36 to the arm31 of a variable rheostat which is generally designated 38.

The resistance element 40 of the rheostat 38 is connected to thealternating current input wire t through the medium of a fuse 4I. A wire42 connects with the wire E between `the fuse 4| and the resistanceelement .II of the rheostat and with the armature 43 of the relay whichis generally designated 44, the armature being conductive in characterand being opposed to a contact 45 from which is normally disengaged.

When the fence 21 and the ground 3| are connected through the body ofan. animal touching the fence, the circuit through the transformersecondary 28 is closed through the wire 26, brush 25, the drum segmentI8, the brush 24, the wire 32. The increased load on the secondarycauses an increase in the' current flowing in the transformer primary 33and in the relay winding 34, suiiicient to cause the relay points 44 toclose. This condition energizes the motor 8 from the alternating currentlines 5 and 6, thereby starting the motor 8 and turning the drum I5 sothat the segment iingenZI and the segment I1 exchange places inengagement with the brush 24, y

the latter continuing to maintain closed the circuit through thetransformer secondary 28 until the drum I4 turns to the position inwhich the en @i brush 24 engages the finger 22, when the motor il willbe deenergized, unless the shorted condition of the fence remains.

Although I have shown and described herein a preferred embodiment of myinvention, it is to be definitely understood that I do not desire tolimit the application of the invention thereto, and any change orchanges may be made in the structure and arrangement of the parts,within the spirit of the invention and the scope of the subioinedclaims.

Having described the invention, what is claimed as new is: Y

l. In combination, a source of alternating current, a self-startingelectric motor having one side directly connected with` .one side oisaid source, a dual segment insulated contact drum operated by saidmotor, a pair of brushes constantly engaging the surface o! the drum andseverally engageable with said segments, a third brush arranged toengage with either of said segments incertain different positions ofrotation of said drum, said third brush being arranged to be out ofcontact with both oi' said segments in otherpositions of rotation ofsaid drum, means to connect one of said pair of brushes to an object tobe charged, a high tension transformer having one side of. its secondaryconnected to said third brush and having its remaining side connected tothe remaining brush of said pair, and grounded, the primary of saidtransformer having one side thereof directly oonnected to the same sideof said source as said one side of the electric motor, a relay contactto which the remainingside of the said motor is connected, a conductiverelay armature related to but normally disengaged from said relaycontact, a relay coil in eieetive relation to said relay armature, saidrelay coil being .balanced in ohmage with respect to the transformerprimary, said armature being connected to the remainingside of saidsource, said relay coil having one end of its winding connected to theremaining side oi the primary oi the transformer and its other sideconnected to the said remaining side of said source.

actress 2. In combination, a source of alternating current, aself-starting electric motor having one side directly connected with oneside oi said source, a dual segment insulated contact drum operated bysaid motor, a pair of brushes constantly engaging the surface of thedrum and severally engageable with said segments, a third brush arrangedto engage with either of said segments in certain different positions ofotation of .said drum, said third brush being arranged to be out ofcontact with both of said Vsegments in other positions 0f rotation ofsaid drum, means to connect one of said pair of brushes to an object tobe charged, a high tension transformer having one side of its secondaryconnected to said third brush and having its remaining side connected tothe remaining brush of said pair, and grounded, the primary of saidtransformer having one side thereof directly connected to the same sideof said source as said one side of the electric motor, a relay contactto which the remaining side of the said motor is connected, a conductiverelay armature related to but normally disengaged from said relaycontact, a relay coil in eiective relation to said relay armature, saidrelay coil being balanced in ohmage with respect to the transformerprimary, said armature being connected to the remaining side of saidsource, said relay coil having oneend of its winding connected to theremaining side of the primary of the transformer and its other sideconnected to the said remaining side of said source, wherebyestablishment of a connection between said object and ground reduces thechoke action of the primary of the transformer with respect to the relaycoil, so as to permit said relay coil to be sulciently energized tooperate said armature and close the relay contacts so as to energize theprimary of the transformer and charge said object with high tensioncurrent while operating said motor to cause intermittent interruption tothe charging of said object.

GLEN EVmETT BORTON.

